(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

David is travelling in his car (1500 kg) at 72 km/h. He sees a dog on the road and hits the brakes, what is the final temperature of his brake pads if they have a combined mass of 10 kg, a heat capacity of 300 J/kgC and they start at 20 degrees Celsius?

2. Relevant equations

Q=mcT

Change in T=T2-T1

3. The attempt at a solution

I am wondering if i have done this right

Ek=1/2mv^2

= 1/2*1500kg*20m/s^2

=300000

-3.0x10^5 J

change in temperature =Q/mc

=3.0x10^5 J/10 kg*300 J/kgC

=100 degrees C

100+20=120 degress Celsius

120 is final temperature of break

-Is this correct?

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# Homework Help: Energy and Power problem (change in tempurature)

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